1 files changed, 17 insertions, 0 deletions
diff --git a/clang-tools-extra/clangd/Protocol.h b/clang-tools-extra/clangd/Protocol.h
index 7026d47b981..940c78f1d59 100644
--- a/clang-tools-extra/clangd/Protocol.h
+++ b/clang-tools-extra/clangd/Protocol.h
@@ -48,6 +48,23 @@ enum class ErrorCode {
   // Defined by the protocol.
   RequestCancelled = -32800,
 };
+// Models an LSP error as an llvm::Error.
+class LSPError : public llvm::ErrorInfo<LSPError> {
+public:
+  std::string Message;
+  ErrorCode Code;
+  static char ID;
+
+  LSPError(std::string Message, ErrorCode Code)
+      : Message(std::move(Message)), Code(Code) {}
+
+  void log(llvm::raw_ostream &OS) const override {
+    OS << int(Code) << ": " << Message;
+  }
+  std::error_code convertToErrorCode() const override {
+    return llvm::inconvertibleErrorCode();
+  }
+};
 
 struct URIForFile {
   URIForFile() = default;